27981499

素因数分解:

$7^2\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{109}}^1$

素因数の和:180

約数の個数: 36

約数和(自身を含む): 36717120

約数和(自身を除く): 8735621

約数列:

[1, 7, 13, 31, 49, 91, 109, 169, 217, 403, 637, 763, 1183, 1417, 1519, 2821, 3379, 5239, 5341, 8281, 9919, 18421, 19747, 23653, 36673, 43927, 69433, 128947, 165571, 256711, 307489, 571051, 902629, 2152423, 3997357, 27981499]

約数ペア:

[(1, 27981499), (7, 3997357), (13, 2152423), (31, 902629), (49, 571051), (91, 307489), (109, 256711), (169, 165571), (217, 128947), (403, 69433), (637, 43927), (763, 36673), (1183, 23653), (1417, 19747), (1519, 18421), (2821, 9919), (3379, 8281), (5239, 5341)]